ok to switch from syn3 to m1 w/ 48000 miles, someone said may not want to with that many miles already , always ran syn3...99 ultra 88 t/c

 

Both are synthetic, no logical reason you can't.

 

Why change now?

 

No problem in switching synthetic oils from Harley Syn3 to Mobil 1.

 

My only real experience with switching oils came with a 88 bronco, went from dino to syn at 50K, motor crapped out. Doesn;t really prove anything, might have gone bad with dino. Can't see it as a bad thing when they push syn for high mileage motors in cars. Or maybe partly syn oils.

 

For a better quality oil that IS a full synthetic oil and not a fake blended oil selling at the price of synthetic.

You can change at any time and get better protection with the M1 too.

 

if it gave you 50,000 miles why chance on changing i use redline and woulden`t change it has serviced me well why change it if it ain`t broken

 

Syn-3 is a blended oil (synthetic and dino) so in effect you have already been running synthetic. I don't run their oil and do not suggest it to anyone. Mobile 1 is a pretty good choice..

 

That is not that many miles...you could get to 50K just using KY Jelly as a lubricant... dosn't mean it is doing a great job.

R. Todd

 

I switched at 40,000 to Mobil 1. Currently at 84,000 miles and still not using oil b/w changes. I liked it because it's less expensive and available pretty much anywhere.